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Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos

Mathew Madhavacheril et al. (Atacama Cosmology Telescope Collaboration)
Phys. Rev. Lett. 114, 151302 – Published 13 April 2015; Erratum Phys. Rev. Lett. 114, 189901 (2015)
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Abstract

We present evidence of the gravitational lensing of the cosmic microwave background by 1013 solar mass dark matter halos. Lensing convergence maps from the Atacama Cosmology Telescope Polarimeter (ACTPol) are stacked at the positions of around 12 000 optically selected CMASS galaxies from the SDSS-III/BOSS survey. The mean lensing signal is consistent with simulated dark matter halo profiles and is favored over a null signal at 3.2σ significance. This result demonstrates the potential of microwave background lensing to probe the dark matter distribution in galaxy group and galaxy cluster halos.

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  • Received 30 November 2014
  • Publisher error corrected 17 April 2015

DOI:https://doi.org/10.1103/PhysRevLett.114.151302

© 2015 American Physical Society

Corrections

17 April 2015

Erratum

Publisher’s Note: Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos [Phys. Rev. Lett. 114, 151302 (2015)]

Mathew Madhavacheril et al. (Atacama Cosmology Telescope Collaboration)
Phys. Rev. Lett. 114, 189901 (2015)

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Weighing Dark Matter Halos with the Cosmic Microwave Background

Published 13 April 2015

Gravitational lensing by foreground dark matter halos leaves an observable imprint on the cosmic microwave background, which can be used to determine their masses

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Vol. 114, Iss. 15 — 17 April 2015

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